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<FONT color="green">001</FONT>    // Copyright 2006 Waterken Inc. under the terms of the MIT X license<a name="line.1"></a>
<FONT color="green">002</FONT>    // found at http://www.opensource.org/licenses/mit-license.html<a name="line.2"></a>
<FONT color="green">003</FONT>    package org.ref_send.type;<a name="line.3"></a>
<FONT color="green">004</FONT>    <a name="line.4"></a>
<FONT color="green">005</FONT>    import java.lang.reflect.ParameterizedType;<a name="line.5"></a>
<FONT color="green">006</FONT>    import java.lang.reflect.Type;<a name="line.6"></a>
<FONT color="green">007</FONT>    import java.lang.reflect.TypeVariable;<a name="line.7"></a>
<FONT color="green">008</FONT>    import java.lang.reflect.WildcardType;<a name="line.8"></a>
<FONT color="green">009</FONT>    <a name="line.9"></a>
<FONT color="green">010</FONT>    /**<a name="line.10"></a>
<FONT color="green">011</FONT>     * Type definition manipulation.<a name="line.11"></a>
<FONT color="green">012</FONT>     */<a name="line.12"></a>
<FONT color="green">013</FONT>    public final class<a name="line.13"></a>
<FONT color="green">014</FONT>    Typedef {<a name="line.14"></a>
<FONT color="green">015</FONT>        private Typedef() {}<a name="line.15"></a>
<FONT color="green">016</FONT>    <a name="line.16"></a>
<FONT color="green">017</FONT>        /**<a name="line.17"></a>
<FONT color="green">018</FONT>         * Gets the named type variable.<a name="line.18"></a>
<FONT color="green">019</FONT>         * @param declaration   generic declaration<a name="line.19"></a>
<FONT color="green">020</FONT>         * @param name          variable name<a name="line.20"></a>
<FONT color="green">021</FONT>         * @return corresponding type variable<a name="line.21"></a>
<FONT color="green">022</FONT>         * @throws NullPointerException no matching variable found<a name="line.22"></a>
<FONT color="green">023</FONT>         */<a name="line.23"></a>
<FONT color="green">024</FONT>        static public &lt;T&gt; TypeVariable&lt;Class&lt;T&gt;&gt;<a name="line.24"></a>
<FONT color="green">025</FONT>        var(final Class&lt;T&gt; declaration, final String name) {<a name="line.25"></a>
<FONT color="green">026</FONT>            for (final TypeVariable&lt;Class&lt;T&gt;&gt; i : declaration.getTypeParameters()) {<a name="line.26"></a>
<FONT color="green">027</FONT>                if (i.getName().equals(name)) { return i; }<a name="line.27"></a>
<FONT color="green">028</FONT>            }<a name="line.28"></a>
<FONT color="green">029</FONT>            throw new NullPointerException();<a name="line.29"></a>
<FONT color="green">030</FONT>        }<a name="line.30"></a>
<FONT color="green">031</FONT>    <a name="line.31"></a>
<FONT color="green">032</FONT>        /**<a name="line.32"></a>
<FONT color="green">033</FONT>         * Gets the value of a type variable.<a name="line.33"></a>
<FONT color="green">034</FONT>         * @param p type variable<a name="line.34"></a>
<FONT color="green">035</FONT>         * @param a instantiated type<a name="line.35"></a>
<FONT color="green">036</FONT>         * @return type argument, or &lt;code&gt;null&lt;/code&gt; if &lt;code&gt;p&lt;/code&gt; is not from<a name="line.36"></a>
<FONT color="green">037</FONT>         *         &lt;code&gt;a&lt;/code&gt; or one of its super types<a name="line.37"></a>
<FONT color="green">038</FONT>         */<a name="line.38"></a>
<FONT color="green">039</FONT>        static public Type<a name="line.39"></a>
<FONT color="green">040</FONT>        value(final TypeVariable&lt;?&gt; p, final Type a) {<a name="line.40"></a>
<FONT color="green">041</FONT>            Type r;<a name="line.41"></a>
<FONT color="green">042</FONT>            final Class&lt;?&gt; template = raw(a);<a name="line.42"></a>
<FONT color="green">043</FONT>            final Class&lt;?&gt; declaration = (Class&lt;?&gt;)p.getGenericDeclaration();<a name="line.43"></a>
<FONT color="green">044</FONT>            if (declaration == template) {<a name="line.44"></a>
<FONT color="green">045</FONT>                r = p;<a name="line.45"></a>
<FONT color="green">046</FONT>            } else if (declaration.isAssignableFrom(template)) {<a name="line.46"></a>
<FONT color="green">047</FONT>                r = null;<a name="line.47"></a>
<FONT color="green">048</FONT>                for (final Type i : template.getGenericInterfaces()) {<a name="line.48"></a>
<FONT color="green">049</FONT>                    r = value(p, i);<a name="line.49"></a>
<FONT color="green">050</FONT>                    if (null != r) { break; }<a name="line.50"></a>
<FONT color="green">051</FONT>                }<a name="line.51"></a>
<FONT color="green">052</FONT>                if (null == r) {<a name="line.52"></a>
<FONT color="green">053</FONT>                    r = value(p, template.getGenericSuperclass());<a name="line.53"></a>
<FONT color="green">054</FONT>                }<a name="line.54"></a>
<FONT color="green">055</FONT>            } else {<a name="line.55"></a>
<FONT color="green">056</FONT>                return null;<a name="line.56"></a>
<FONT color="green">057</FONT>            }<a name="line.57"></a>
<FONT color="green">058</FONT>            if (r instanceof TypeVariable&lt;?&gt;) {<a name="line.58"></a>
<FONT color="green">059</FONT>                if (a instanceof ParameterizedType) {<a name="line.59"></a>
<FONT color="green">060</FONT>                    int i = 0;<a name="line.60"></a>
<FONT color="green">061</FONT>                    for (final TypeVariable&lt;?&gt; v : declaration.getTypeParameters()){<a name="line.61"></a>
<FONT color="green">062</FONT>                        if (p.equals(v)) { break; }<a name="line.62"></a>
<FONT color="green">063</FONT>                        ++i;<a name="line.63"></a>
<FONT color="green">064</FONT>                    }<a name="line.64"></a>
<FONT color="green">065</FONT>                    r = ((ParameterizedType)a).getActualTypeArguments()[i];<a name="line.65"></a>
<FONT color="green">066</FONT>                } else {<a name="line.66"></a>
<FONT color="green">067</FONT>                    r = Object.class;   // Class implements the raw type.<a name="line.67"></a>
<FONT color="green">068</FONT>                }<a name="line.68"></a>
<FONT color="green">069</FONT>            }<a name="line.69"></a>
<FONT color="green">070</FONT>            return r;<a name="line.70"></a>
<FONT color="green">071</FONT>        }<a name="line.71"></a>
<FONT color="green">072</FONT>    <a name="line.72"></a>
<FONT color="green">073</FONT>        /**<a name="line.73"></a>
<FONT color="green">074</FONT>         * Determine the corresponding raw type.<a name="line.74"></a>
<FONT color="green">075</FONT>         * @param type  generic type<a name="line.75"></a>
<FONT color="green">076</FONT>         * @return corresponding raw type<a name="line.76"></a>
<FONT color="green">077</FONT>         */<a name="line.77"></a>
<FONT color="green">078</FONT>        static public Class&lt;?&gt;<a name="line.78"></a>
<FONT color="green">079</FONT>        raw(final Type type) {<a name="line.79"></a>
<FONT color="green">080</FONT>            return type instanceof Class&lt;?&gt;<a name="line.80"></a>
<FONT color="green">081</FONT>                ? (Class&lt;?&gt;)type<a name="line.81"></a>
<FONT color="green">082</FONT>            : (type instanceof ParameterizedType<a name="line.82"></a>
<FONT color="green">083</FONT>                ? raw(((ParameterizedType)type).getRawType())<a name="line.83"></a>
<FONT color="green">084</FONT>            : (type instanceof WildcardType<a name="line.84"></a>
<FONT color="green">085</FONT>                ? raw(((WildcardType)type).getUpperBounds()[0])<a name="line.85"></a>
<FONT color="green">086</FONT>            : Object.class));<a name="line.86"></a>
<FONT color="green">087</FONT>        }<a name="line.87"></a>
<FONT color="green">088</FONT>        <a name="line.88"></a>
<FONT color="green">089</FONT>        /**<a name="line.89"></a>
<FONT color="green">090</FONT>         * Determine the upper bound on a type parameter.<a name="line.90"></a>
<FONT color="green">091</FONT>         * @param parameter generic parameter type<a name="line.91"></a>
<FONT color="green">092</FONT>         * @param declared  generic class type<a name="line.92"></a>
<FONT color="green">093</FONT>         * @return upper bound on the actual type<a name="line.93"></a>
<FONT color="green">094</FONT>         */<a name="line.94"></a>
<FONT color="green">095</FONT>        static public Type<a name="line.95"></a>
<FONT color="green">096</FONT>        bound(final Type parameter, final Type declared) {<a name="line.96"></a>
<FONT color="green">097</FONT>            final Type argument = parameter instanceof TypeVariable&lt;?&gt;<a name="line.97"></a>
<FONT color="green">098</FONT>                ? value((TypeVariable&lt;?&gt;)parameter, declared)<a name="line.98"></a>
<FONT color="green">099</FONT>            : parameter;<a name="line.99"></a>
<FONT color="green">100</FONT>            return argument instanceof WildcardType<a name="line.100"></a>
<FONT color="green">101</FONT>                ? ((WildcardType)argument).getUpperBounds()[0]<a name="line.101"></a>
<FONT color="green">102</FONT>            : argument;<a name="line.102"></a>
<FONT color="green">103</FONT>        }<a name="line.103"></a>
<FONT color="green">104</FONT>     }<a name="line.104"></a>




























































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